Green Bay, WI

What the Data Says About GRB

Green Bay, WI in Green Bay, Wisconsin handled 48,314 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.5% on-time departure rate. Of those flights, 7,024 experienced delays, 486 were cancelled, and 18 were diverted. The cancellation rate works out to 1.01%, the diversion rate to 0.04%, and the average delay when departures run late is 88.1 minutes. These figures are the baseline for comparing GRB against other airports in the same state and nationally.

Breaking down what drives delays at GRB, Carrier leads the pack. Carrier accounts for 49.4% of total delay minutes, followed by Late Aircraft at 23.3% and NAS (National Aviation System) at 15.2%. Weather contributes 12.1% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, October runs the cleanest at GRB with a 95.9% on-time rate, while December is the roughest at 91.7% — a 4-point swing between best and worst month. Volume peaks in August, when average flights hit 738. The busiest route from GRB is to GRB (Green Bay), with 9,678 flights at a 79.4% on-time rate. Combine these numbers — 85.5% on-time, 88.1-minute average delay, 1.01% cancellation rate — and you have a concrete picture of departure reliability at Green Bay, WI.